About Rhonda A. Sanderson, MD. Rhonda Ann Sanderson, MD is an obstetrician & gynecologist and gynecologist who practices at Rhonda A. Sanderson, MD Practice located at 340 Main St in Suite 2 in Madison, NJ 07940 (Madison County). Dr. Rhonda A. Sanderson may be affiliated with: Comprehensive Family Medicine in Warren, NJ 07059.